I want to reduce the loss in this house, to keep warmer and to cut down on heating bills.
I have felt cold air around several of the windows, and the back door.
I bought several "window insulation kits" that have clear plastic film and double-sided tape, for over the windows. If your window is already sound, it can work like an additional barrier of air-insulation.
Ruby asked a son to install the kits. I told him that I wanted him to use other tape over the gaps in the window frames, which seemed to be letting cold air in, before he put on the window kit layer.
Roof insulation is important. We have a double layer of 4 inch insulation in ours and it made a big difference.
The son didn't think the tape was necessary. Air was leaking through one window so badly that it blew the plastic off the double-sided tape.
He did another window without removing the air conditioner window unit that we use in the summer. So, he was trying to block winter air with a thin film of plastic, with the window half-way open. There was no inside or outside cover on the air conditioner!
Yet another window, he covered the slat blinds with the plastic, instead of putting the plastic between the window and the blinds. That didn't work well, either, but was not as bad as the other two I mentioned.
You can fix the windows. Draft excluders can work well too. Keep the oven door open after cooking is finished. Fill up hot water bottles during the day as well as to put in your bed before sleep. http://www.energysavingtrust.org.uk/home-insulation/draught-proofing
This is very likely not available across the entire USA.
My municipality has an ongoing grant to do energy audits for all the residences within its geographic borders; once the audit is complete, it has SOME/limited funds for 'fixes'. I have no idea how that works for renters. Over the years, I have gotten CFC light bulbs, a room size air conditioner, and a fridge that because it wouln't fit through the front door, had to be returned. Ditto re free smoke detectors [true story: on duty firefighters were going from door to door on my block in the middle of the day trying to get people to sign up for a fire prevention audit-mostly whether they had at least the recommended minimum number on each floor-some of their knocks on people's doors were NOT answered. That caught my attention. I approached one of the firefighters and asked why they were going around in the middle of the day when some folks would be at work. You should have seen the look of astonishment on his and close by colleagues that no one had thought of that especially since they had 3 shifts of firefighters 24/7.
So why don't you call your local govt (municipal/county) and see if they have something like that [and the non-emergency number for the fire dept re smoke detectors].
For the window plastic, I favor tacking thin strips of wood against the plastic in a way that frames the window. The small nails will hold the wood
more securely than the double-sided tape that comes in the kits would hold the plastic alone.
I will look into what Marymary posted.
Jack, I heard on the radio that I live in the poorest zip code in the U.S. I would be amazed to hear that any funds were available to help, when there are so many urgent problems. I live in Illinois, remember, one of the worst-financed states in the U.S.